Thomas eglestof



y sentially basic.

UNITED STATES PATENT OEEICE. i

rHoMAsEeLEsToN, oE NEW YoEK, N. Y.;

CRUCILLMUFFLE, sw. f

srEcIFIcATIoN refining part pf Letters Patent No. aegee?, dated september 4, 1883. Application fixed March Vmee-3.` (No nodel.)

`@To all whom it may con/cern.'

Beit known that I, THOMAS EeLEs'roN, of New York, in the county and State of New York, have invented a certainnew and useful `Improvement in Grucibles, Muffles, and other xvvesselslin which metals are-melted, reduced, `or distilled, of whichf the following is a specification. i

The obj ect of my improvement is to produce a vessel having the interior surface of such n character tha it will not be chemically `or y fpmechanicallyected by the contents, and the L. exterior surface of such nature that it will not be materially injured by the heatto which `it will be subjected when the vessel is in use, and also of such nature that melted ashes of fuel willy not become so rmly united with or adhered to it as`to require to `be-removed by blows, which would endanger the vessel.

' The accompanying drawing represents a central vertical section of a vessel embodying my improvement. i '1 The interior surface, A,\of this vessel is es- It maybe made of baryta,

strontia, lime, magnesia, alumina, or any two or more of these materials, or a form of carbonsuch, `for instance, as graphite, anthracite, gas-carbon, or coke-mixed withany of v the basic refractory materials.

employed may be pulverized` and mixed with water or other liquid to form apaste, and then may be shapedin molds .or by any other suity ablemeans.

stance, as silicate ofbaryta, stronti a, lime, magrl`he materialV nesia, or alumina, or of the elements of which these materials are composed. Where thevessel will be exposed to highly corrosiveashes this surface may be made of one or more of these silicates or mixtures, combined. in variable proportions with one or more of the basic materials above enumerated. rlhe materials employed for this surface may be comminuted and mixed with water or other liquid to form a paste, and may be shaped in molds or by any other` suitable means..l Either surface may be made first and the other formed around it, or both may be formed together.

In some cases both the exterior and interior surfaces `may be made essentially of basic material; but even in that case, they will be constituted differently from I each other. In such cases the two surfaces maybe differently constituted by making the surfaces of different basic materials, or of differently-constituted .basic materials.

What I claim as my invention, and desire t0 secure by Letters Patent, is-

A crucible, mufiie, or other vessel used in` melting, reducing, or distilling metals having the interior surface made essentially of basic refractory material, .and the exterior surface essentially of acid refractory material, or hav-` ing its two surfaces made of differentlyconsti- `tuted basic materials or of different basic `ma- Witnesses. JAMES l?. BOWEN,` T. J. KEANE.

4 It is hereby certified that in Letters Patent No. 284,287, granted September 4, 1883, upon the application of ThomasEgleston, of New York, N. Y., for an improvement in Grucib1es, Mufes, Ste, an error appears requiring correction, as follows: in line 12 of the printed specification the Word effected should read ejected; and that ,the

patent should. be read With this `correction therein to make it conform to the record of the 'case in the Patent Office.

Signed, countersigned', and sealed this 11th day of September, A. D.'1883.

[SEAL] M. L. JOSLYN,

i Acting Secretary of the Inter-iov. Gountersigned:

. E. M. MARBLE,

Oommtsstonq' of Paten-ts. 

